28088425 has 24 divisors (see below), whose sum is σ = 35935200. Its totient is φ = 21770880.

The previous prime is 28088413. The next prime is 28088447. The reversal of 28088425 is 52488082.

It is a de Polignac number, because none of the positive numbers 2^k-28088425 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202006 + ... + 202144.

It is an arithmetic number, because the mean of its divisors is an integer number (1497300).

Almost surely, 2^28088425 is an apocalyptic number.

28088425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28088425 is a deficient number, since it is larger than the sum of its proper divisors (7846775).

28088425 is a wasteful number, since it uses less digits than its factorization.

28088425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 37.

The square root of 28088425 is about 5299.8514130115. The cubic root of 28088425 is about 303.9782164966.

The spelling of 28088425 in words is "twenty-eight million, eighty-eight thousand, four hundred twenty-five".